Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss

We analyze two high-resolution spectral transit time series of the hot Jupiter HAT-P-32 b obtained with the CARMENES spectrograph. Our new XMM-Newton X-ray observations of the system show that the fast-rotating F-type host star exhibits a high X-ray luminosity of 2.3 x 10(29) erg s(-1) (5-100 A), co...

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Authors: Montes Gutiérrez, David, otros, ...
Format: article
Publication Date:2021
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/4917
Online Access:https://hdl.handle.net/20.500.14352/4917
Access Level:Open access
Keyword:52
Extended helium atmosphere
Photon imaging camera
To-limb variation
X-ray-emission
Transmission spectrum
Xmm-newton
Metastable helium
Fraunhofer lines
Warm Neptune
Bow shock
Astrofísica
id ES_0a7dff6aead6b5d8766bee85cffff4fe
oai_identifier_str oai:docta.ucm.es:20.500.14352/4917
network_acronym_str ES
network_name_str España
repository_id_str
spelling Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass lossMontes Gutiérrez, Davidotros, ...52Extended helium atmospherePhoton imaging cameraTo-limb variationX-ray-emissionTransmission spectrumXmm-newtonMetastable heliumFraunhofer linesWarm NeptuneBow shockAstrofísicaWe analyze two high-resolution spectral transit time series of the hot Jupiter HAT-P-32 b obtained with the CARMENES spectrograph. Our new XMM-Newton X-ray observations of the system show that the fast-rotating F-type host star exhibits a high X-ray luminosity of 2.3 x 10(29) erg s(-1) (5-100 A), corresponding to a flux of 6.9 x 10(4) erg cm(-2) s(-1) at the planetary orbit, which results in an energy-limited escape estimate of about 10(13) g s(-1) for the planetary mass-loss rate. The spectral time series show significant, time-dependent absorption in the H alpha and He I lambda 10833 triplet lines with maximum depths of about 3.3% and 5.3%. The mid-transit absorption signals in the H alpha and He I lambda 10833 lines are consistent with results from one-dimensional hydrodynamic modeling, which also yields mass-loss rates on the order of 10(13) g s(-1). We observe an early ingress of a redshifted component of the transmission signal, which extends into a redshifted absorption component, persisting until about the middle of the optical transit. While a super-rotating wind can explain redshifted ingress absorption, we find that an up-orbit stream, transporting planetary mass in the direction of the star, also provides a plausible explanation for the pre-transit signal. This makes HAT-P-32 a benchmark system for exploring atmospheric dynamics via transmission spectroscopy.EDP ScienciesUniversidad Complutense de Madrid20212021-12-2020212021-12-20journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/4917reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/49172026-06-02T12:44:21Z
dc.title.none.fl_str_mv Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
title Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
spellingShingle Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
Montes Gutiérrez, David
52
Extended helium atmosphere
Photon imaging camera
To-limb variation
X-ray-emission
Transmission spectrum
Xmm-newton
Metastable helium
Fraunhofer lines
Warm Neptune
Bow shock
Astrofísica
title_short Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
title_full Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
title_fullStr Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
title_full_unstemmed Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
title_sort Hα and He I absorption in HAT-P-32 b observed with CARMENES Detection of Roche lobe overflow and mass loss
dc.creator.none.fl_str_mv Montes Gutiérrez, David
otros, ...
author Montes Gutiérrez, David
author_facet Montes Gutiérrez, David
otros, ...
author_role author
author2 otros, ...
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Extended helium atmosphere
Photon imaging camera
To-limb variation
X-ray-emission
Transmission spectrum
Xmm-newton
Metastable helium
Fraunhofer lines
Warm Neptune
Bow shock
Astrofísica
topic 52
Extended helium atmosphere
Photon imaging camera
To-limb variation
X-ray-emission
Transmission spectrum
Xmm-newton
Metastable helium
Fraunhofer lines
Warm Neptune
Bow shock
Astrofísica
description We analyze two high-resolution spectral transit time series of the hot Jupiter HAT-P-32 b obtained with the CARMENES spectrograph. Our new XMM-Newton X-ray observations of the system show that the fast-rotating F-type host star exhibits a high X-ray luminosity of 2.3 x 10(29) erg s(-1) (5-100 A), corresponding to a flux of 6.9 x 10(4) erg cm(-2) s(-1) at the planetary orbit, which results in an energy-limited escape estimate of about 10(13) g s(-1) for the planetary mass-loss rate. The spectral time series show significant, time-dependent absorption in the H alpha and He I lambda 10833 triplet lines with maximum depths of about 3.3% and 5.3%. The mid-transit absorption signals in the H alpha and He I lambda 10833 lines are consistent with results from one-dimensional hydrodynamic modeling, which also yields mass-loss rates on the order of 10(13) g s(-1). We observe an early ingress of a redshifted component of the transmission signal, which extends into a redshifted absorption component, persisting until about the middle of the optical transit. While a super-rotating wind can explain redshifted ingress absorption, we find that an up-orbit stream, transporting planetary mass in the direction of the star, also provides a plausible explanation for the pre-transit signal. This makes HAT-P-32 a benchmark system for exploring atmospheric dynamics via transmission spectroscopy.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-12-20
2021
2021-12-20
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/4917
url https://hdl.handle.net/20.500.14352/4917
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciencies
publisher.none.fl_str_mv EDP Sciencies
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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